From 7f3e6845d29403b19d117f2882da346ecc737e13 Mon Sep 17 00:00:00 2001
From: Kai <kboenke@users.noreply.github.com>
Date: Wed, 31 Jul 2024 17:10:12 +0200
Subject: [PATCH 1/2] Bugfixing  NULL values

Caused issues when environmental sensor was unavailable.
---
 plugins/snmp/snmp__cyberpower | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/snmp/snmp__cyberpower b/plugins/snmp/snmp__cyberpower
index f8b592e29..712380752 100755
--- a/plugins/snmp/snmp__cyberpower
+++ b/plugins/snmp/snmp__cyberpower
@@ -178,7 +178,7 @@ sub oidExists {
 	my $oid = $_[0];
 	my $val = $session->get_single($oid);
 
-	if(!length $val || $val eq 'noSuchInstance' || $val eq 'U'){
+	if(!length $val || $val eq 'noSuchInstance' || $val eq 'U' || $val eq 'NULL'){
 		return(0);
 	}else{
 		return(1);

From 14b033453db0ddb41d86f1bacc41052ecf4464fb Mon Sep 17 00:00:00 2001
From: Kai <kboenke@users.noreply.github.com>
Date: Wed, 31 Jul 2024 17:13:47 +0200
Subject: [PATCH 2/2] Created shelly__power

Monitoring of Shelly 3EM network-devices.
---
 plugins/shelly/shelly__power | 133 +++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 plugins/shelly/shelly__power

diff --git a/plugins/shelly/shelly__power b/plugins/shelly/shelly__power
new file mode 100644
index 000000000..2382bc7f3
--- /dev/null
+++ b/plugins/shelly/shelly__power
@@ -0,0 +1,133 @@
+#!/bin/bash
+
+: << =cut
+
+=head1 NAME
+
+Power-Monitor using Shelly 3EM devices.
+
+=head1 CONFIGURATION
+
+Requires 'curl' and 'jq'.
+
+=head1 AUTHOR
+
+Kai Boenke
+
+=head1 LICENSE
+
+Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
+
+=back
+
+=cut
+
+
+#####
+# Check prerequisites
+###
+if ! command -v "curl" > /dev/null 2>&1; then
+  echo "curl is not installed or not in PATH." >&2
+  exit -1
+fi
+if ! command -v "jq" > /dev/null 2>&1; then
+  echo "jq is not installed or not in PATH." >&2
+  exit -1
+fi
+
+#####
+# Configuration
+###
+PLUGIN_NAME=${0##*/}
+HOST_NAME=$(echo "$PLUGIN_NAME" | cut -d'_' -f2)
+
+BASE_URL="http://${HOST_NAME}/emeter"
+declare -A ENDPOINTS=(
+  ["sensor_a"]="0/3em_data"
+  ["sensor_b"]="1/3em_data"
+  ["sensor_c"]="2/3em_data"
+)
+declare -A LABELS=(
+  ["sensor_a"]="Phase A"
+  ["sensor_b"]="Phase B"
+  ["sensor_c"]="Phase C"
+)
+
+#####
+# Handle Munin-Config
+##
+case $1 in
+  config)
+    # Power Consumption
+    echo "multigraph shelly_power"
+    echo "graph_title Power Consumption"
+    echo "graph_vlabel watt [w]"
+    echo "graph_category sensors"
+    echo "graph_info Current power consumption for each phase."
+    for sensor in "${!LABELS[@]}"; do
+      echo "${sensor}_w.label ${LABELS[$sensor]}"
+      echo "${sensor}_w.warning 800"
+      echo "${sensor}_w.critical 1000"
+    done
+    # Voltages
+    echo "multigraph shelly_voltage"
+    echo "graph_title Voltages"
+    echo "graph_vlabel volt [V]"
+    echo "graph_category sensors"
+    echo "graph_info Current voltages for each phase."
+    for sensor in "${!LABELS[@]}"; do
+      echo "${sensor}_v.label ${LABELS[$sensor]}"
+      echo "${sensor}_v.warning 220:240"
+      echo "${sensor}_v.critical 210:250"
+    done
+    # Power Factor
+    echo "multigraph shelly_pf"
+    echo "graph_title Power Factor"
+    echo "graph_vlabel I/V"
+    echo "graph_category sensors"
+    echo "graph_info Current power factor for each phase."
+    for sensor in "${!LABELS[@]}"; do
+      echo "${sensor}_pf.label ${LABELS[$sensor]}"
+    done
+    exit 0;;
+esac
+
+#####
+# Measurements
+###
+
+echo "multigraph shelly_power"
+for sensor in "${!ENDPOINTS[@]}"; do
+  url="${BASE_URL}/${ENDPOINTS[$sensor]}"
+  response=$(curl -s "$url")
+  if [ $? -eq 0 ]; then
+    power=$(echo "$response" | jq -r '.power')
+    echo "${sensor}_w.value ${power}"
+  else
+    echo "${sensor}_w.value U"
+  fi
+done
+
+echo "multigraph shelly_voltage"
+for sensor in "${!ENDPOINTS[@]}"; do
+  url="${BASE_URL}/${ENDPOINTS[$sensor]}"
+  response=$(curl -s "$url")
+  if [ $? -eq 0 ]; then
+    power=$(echo "$response" | jq -r '.voltage')
+    echo "${sensor}_v.value ${power}"
+  else
+    echo "${sensor}_v.value U"
+  fi
+done
+
+echo "multigraph shelly_pf"
+for sensor in "${!ENDPOINTS[@]}"; do
+  url="${BASE_URL}/${ENDPOINTS[$sensor]}"
+  response=$(curl -s "$url")
+  if [ $? -eq 0 ]; then
+    power=$(echo "$response" | jq -r '.pf')
+    echo "${sensor}_pf.value ${power}"
+  else
+    echo "${sensor}_pf.value U"
+  fi
+done